Rotary shutter for moving-picture cameras.



C. E. AKELEY. RARY SHUT'ER FOR MOVING PICTURE CAMERAS. A'PPmcrATlou man APR. io. 1915.

ffii'- UNITED STATES PATENT OFFTCE. i

Original application filed August 3, 1914, Serial No; 854,777.

Serial No. 20,412.

CARL n AKELEY, or NEW YORK, N. Y., Assienon To YORK, N. Y., A CORPORATION oF AKELEY CAMERA, INC., 0F NEVI NEW YORK.

ROTARY SHUTTER FOR MOVING-PICTURE CAMERAS.

To all whom t may concern Be it known that l, CARL E. Animer, a citizen of the United States` and a resident of New York' city, county and State of New York, have invented certain new and uset'ul Improvements in Rotary Shutters for 'Moving-Picture Cameras, ot' which the following is a specification.

This invention relates to a novel rotary shutter more particularly designed to be used in conjunction with moving picture cameras, such for instance as shown in a co pending" patent 'application filed by me August 3rd, 1914, under Serial Number 854,777, of which this application is a division.

1n the accompanying drawing: Figure 1 is a cross section through part of a moving picture ca'mer'a provided with my improved rotary shutter; Fig. 2 an outer view of part of the shutter laid out in a plane, and Fig. 3 a detail of the speed regulator for the shutter.

which film is adapted to be intermittently fed across an opening 14 of said box, said opening being alined with a similar opening 15 provided Within easing 10 opposite the lens tube 16. The intermittent advance movement of film 13 is eii'ected through a suitable feeding device 17 actuated by a power shaft 18 which device part 4of the present invention.

. As clearly illustrated in Fig. 1, the inner endl Iwall 19 of theiilm box 11 is spaced from the corresponding `wal1 20 of casing 10 there by providing a circular chamber 21 that communicates with the annularchamber 12. Within chamber 21 is arranged a pair of oppositely bulged disks 22 of a shutter A that are rigidly mountedat their spaced -centers upon shaft 18 in any suitable manner., The disks22 are firmly united alon their-contacting peripheries as at 23 an carry here a cylindrical shell 24. The latter is probided with an opening 25 adapted to expose that film-portion which happens to be Specification of Letters Patent.

does not form Patented llllar. 2S, 191e?. Divided and this application led April 10,

located opposite opening 14, the opening 25 and the matic brake is provided which is shown to comprise a brake shoe 29 pivoted to the shutter at 30 and influenced by a spring 31. Opposite the path of shoe 29 is arranged a resilient blade or buffer 32 which is secured to casing l0 in suitable manner. The Weight of shoe 29 and thestrength of spring 31 should beso calculated that during the nor mal speed of the shutter, the centrifugal force acting on the brake shoe will be insurlicient to cause an engagement between said shoe and blade. As soon as the speed increases however, the shoe 29 will come into contact with the blade 32 thereby c0rrespondingly retarding the rotary speed of the shutter. l

It will be seen th t my novel rotary shutter is of simple c nstruction, may be easily operated and is not apt to swerve during operation.

I claim:

1. In a movin picture camera, a casing, a lens tube secured thereto, a cylindrical shutter vvvithin the casing and having an opening that is adapted to become alined with the lens tube, a spring-influenced brake shoe pivoted to the shutter, a resilient blade secured tomthelcasing and adapted t0 be engaged by the brake shoe, and means for rotatin the shutter.

2. n a moving picture camera, a casing, a shaft journaled therein and a shutter carried thereby, said shutter .consisting of a pair of'oppositely bulged disks united along their periphery and secured to said shaft, and of an apertured cylinder carried by said disks.

2 A l Mui/mme 3. In @moving picture camera, a casing, l. A rotary shutter comprising e cylina shaft journaled therein, and a shutter cardrical shell having a pair of opposelyup- 'red thereby, said shutter Consisting of :n turned iaps to form an intervening openinga l0 ,I pair of oppositely bulged disks united along a rotary shaft, and means for securing said `v-their periphery and secured to said shaft, ,shel to said shaft.

- and Qt ,an apertured balanced cylinder cur- I @by `said disks-. CARL E. ASLEY. 

